When the Union troops went to the South, if slaves saw the union troops they'd follow them and become part of the army usually because it meant freedom.
Liberia's landscapes range from flat coastal lowlands with mangroves and swamps, to rolling hills and plateaus further inland, and low mountains in the northeast.
I believe the answer is A
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After the president gets a bill they can choose to either approve or veto it. If they veto it goes back to congress to be voted on again. If he approves it becomes a law.